docs: def del_graph(self, graph):
          """Delete all records to do with the graph"""
          g = self.pack(graph)
          self.sql('del_edge_val_graph', g)
          self.sql('del_node_val_graph', g)
          self.sql('del_edge_val_graph', g)
          self.sql('del_edges_graph', g)
          self.sql('del_nodes_graph', g)
          self.sql('del_graph', g)